Search resumes for missing Iowa cousins, 8 and 10

Authorities say they've uncovered no significant evidence in the search for two missing girls, three days after their bicycles and a purse were found near a lake in northeast Iowa.

Black Hawk County Sheriff's Deputy Rick Abben says local, state and federal authorities have been "grasping for straws" in the frantic search for 8-year-old Elizabeth Collins and her 10-year-old cousin, Lyric Cook-Morrissey.

Abben says no eyewitnesses have reported seeing the girls. They've been missing since leaving their grandmother's house Friday afternoon in Evansdale.

Several hundred volunteers helped search the area Saturday and Sunday around Meyers Lake in Evansdale.

Abben says authorities have been doing house-to-house searches around the clock. He says it's still considered a missing persons case.